Horizon Air (QX/QXE)

Horizon Air Industries, Inc., operating as Horizon Air, is a regional airline based in SeaTac, Washington, United States. Horizon Air and its sister carrier Alaska Airlines are subsidiaries of Alaska Air Group and all Horizon-operated scheduled flights are marketed and sold by Alaska Airlines. Planes operated by Horizon are co-branded as "Alaska Horizon" in recognition of the Horizon brand and to differentiate aircraft from those operated by Alaska's other regional airline partner, SkyWest Airlines.Source: Wikipedia